Focus apparatus of image measuring system

Abstract

A focus apparatus comprises a first illuminator for emitting light onto an object, an optical apparatus, an image capture apparatus for receiving an image of the object through the optical apparatus, and converting the image into electronic signals, a spectroscope, a coaxial light apparatus and a patterned light apparatus. The coaxial light apparatus and the patterned light apparatus are perpendicularly mounted to a spectroscope. The coaxial light apparatus is perpendicular to the patterned light apparatus. The spectroscope refracts patterned light from the patterned light apparatus and coaxial light from the coaxial light apparatus to the optical apparatus.

1. A focus apparatus, comprising:
 a spectroscope; 
 a first illuminator operable to emit light onto an object; 
 an optical apparatus operable to generate an image of the object, wherein the optical apparatus comprises a first object lens, a second object lens, and a partial reflector located between the first and second object lens, and the partial reflector is not parallel to the second object lens; 
 an image capture apparatus operable to receive the image of the object from the optical apparatus, and convert the image into electronic signals; 
 a patterned light apparatus operable to generate patterned light, wherein the patterned light apparatus is perpendicularly mounted to the spectroscope, wherein the patterned light apparatus comprises a second shell, a second illuminator, a first magnification adjuster, and a pattern slide, patterns are formed on a surface of the pattern slide, and the second illuminator is located at a distal end of the second shell and opposite to the spectroscope; 
 a coaxial light apparatus operable to generate coaxial light, wherein the coaxial light apparatus is perpendicularly mounted to the spectroscope, and is perpendicular to the patterned light apparatus; and 
 the spectroscope operable to refract the patterned light emitted from the patterned light apparatus and the coaxial light emitted from the coaxial light apparatus to the optical apparatus. 
 
     
     
       2. The focus apparatus of  claim 1 , wherein the second illuminator is a light emitting diode (LED) illuminator. 
     
     
       3. The focus apparatus of  claim 1 , wherein the patterned light is generated by the second illuminator and passes through the first magnification adjuster, the pattern slide, the spectroscope, the partial reflector, and the second object lens to project patterns of the surface of the pattern slide onto the surface of the object. 
     
     
       4. The focus apparatus of  claim 1 , wherein a plurality of transparent square and a plurality of nontransparent square are formed in a checkerboard fashion on the pattern slide. 
     
     
       5. The focus apparatus of  claim 1 , wherein the coaxial light apparatus comprises a third shell, a third illuminator, a second magnification adjuster, and a third magnification adjuster, and wherein the third illuminator is located at a distal end of the third shell and opposite to the spectroscope. 
     
     
       6. The focus apparatus of  claim 5 , wherein the third illuminator is a LED illuminator. 
     
     
       7. The focus apparatus of  claim 5 , wherein the coaxial light is generated by the third illuminator and passes through the second magnification adjuster, the third magnification, the spectroscope, the partial reflector, and the second object lens to project the coaxial light onto the surface of the object. 
     
     
       8. The focus apparatus of  claim 1 , wherein the spectroscope comprises a fourth shell and a prism. 
     
     
       9. The focus apparatus of  claim 1 , wherein the first illuminator is a LED illuminator or a laser illuminator. 
     
     
       10. The focus apparatus of  claim 1 , wherein the optical apparatus is a charge coupled device (CCD) camera or a complementary metal oxide semiconductor (CMOS) camera.